[Q] where is FTP or sftp log file ???

[mcclnx mcc]

We just migrate out UNIX system to Redhat LINUX system
(AS 3.6).  I tried to find who use "ftp" or "sftp"
login to my server.  on SUN or AIX server I can use:

    last|grep ftp

This commanf does NOT show anything on LINUX.  

Can anyone tell me :

1. where is log file for FTP and sftp?

2. any command similiar to "last" which can check
"ftp" login?

Thanks.

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